\[\left\{ \begin{matrix}t - 5 > 0\ \ \ \\2t - 6 > 0 \\\end{matrix} \right.\ \]
\[\ \left\{ \begin{matrix}t > 5\ \ \ \\2t < 6 \\\end{matrix} \right.\ \]
\[\left\{ \begin{matrix}t > 5 \\t < 3 \\\end{matrix} \right.\ \]
\[нет\ решений.\]